TY - GEN
T1 - Hydrogeochemical characteristics of the aquifers with variable arsenic concentrations
AU - Nath, B.
AU - Jean, J. S.
AU - Stüben, D.
AU - Chatterjee, D.
AU - Mallik, S. B.
PY - 2007
Y1 - 2007
N2 - Arsenic (As) concentrations in groundwater range between >0.1 and 476μl -1, with localized high concentrations in abandoned meander/channel deposits. The groundwater flow lines tend to be deflected away from the high As aquifer. This indicates both low permeability and low recharge rates, as well as an abundance of fine-grained sediments associated with high As areas. These factors allow for high groundwater residence time for sediment-water interaction to occur, thus facilitating the release of As from meander/channel deposits. Borehole lithology analysis confirms our assumption, where finer-sediments are associated with the high As concentrations. Moreover, the presence of silt/clay intercalations within the sandy aquifer at the sites showing high As seems to influence As mobility.
AB - Arsenic (As) concentrations in groundwater range between >0.1 and 476μl -1, with localized high concentrations in abandoned meander/channel deposits. The groundwater flow lines tend to be deflected away from the high As aquifer. This indicates both low permeability and low recharge rates, as well as an abundance of fine-grained sediments associated with high As areas. These factors allow for high groundwater residence time for sediment-water interaction to occur, thus facilitating the release of As from meander/channel deposits. Borehole lithology analysis confirms our assumption, where finer-sediments are associated with the high As concentrations. Moreover, the presence of silt/clay intercalations within the sandy aquifer at the sites showing high As seems to influence As mobility.
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M3 - Conference contribution
AN - SCOPUS:84858053914
SN - 9780415451383
T3 - Water-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12
SP - 1097
EP - 1100
BT - Water-Rock Interaction - Proceedings of the 12th International Symposium on Water-Rock Interaction, WRI-12
T2 - 12th International Symposium on Water-Rock Interaction, WRI-12
Y2 - 31 July 2007 through 4 August 2007
ER -